397435237 has 2 divisors, whose sum is σ = 397435238. Its totient is φ = 397435236.

The previous prime is 397435229. The next prime is 397435253. The reversal of 397435237 is 732534793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 255968001 + 141467236 = 15999^2 + 11894^2 .

It is an emirp because it is prime and its reverse (732534793) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 397435237 - 2³ = 397435229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 397435193 and 397435202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397435277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198717618 + 198717619.

It is an arithmetic number, because the mean of its divisors is an integer number (198717619).

Almost surely, 2^397435237 is an apocalyptic number.

It is an amenable number.

397435237 is a deficient number, since it is larger than the sum of its proper divisors (1).

397435237 is an equidigital number, since it uses as much as digits as its factorization.

397435237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 476280, while the sum is 43.

The square root of 397435237 is about 19935.7778127667. Note that the first 3 decimals coincide. The cubic root of 397435237 is about 735.2281439638.

The spelling of 397435237 in words is "three hundred ninety-seven million, four hundred thirty-five thousand, two hundred thirty-seven".